Invention Grant
- Patent Title: Golf ball
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Application No.: US14473611Application Date: 2014-08-29
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Publication No.: US09694243B2Publication Date: 2017-07-04
- Inventor: Chiemi Mikura , Ayaka Shindo , Mikio Yamada
- Applicant: Dunlop Sports Co., Ltd.
- Applicant Address: JP Kobe-Shi, Hyogo
- Assignee: DUNLOP SPORTS CO. LTD.
- Current Assignee: DUNLOP SPORTS CO. LTD.
- Current Assignee Address: JP Kobe-Shi, Hyogo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2013-181043 20130902
- Main IPC: A63B37/00
- IPC: A63B37/00 ; A63B37/02 ; C08K5/37 ; C08K5/375

Abstract:
An object of the present invention is to provide a golf ball showing a low spin rate on driver shots and an excellent shot feeing. The present invention provides a golf ball having a spherical core and at least one cover covering the spherical core, wherein the spherical core is formed from a rubber composition containing: (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and at least one compound of (d) mercaptobenzoic acids and/or salts thereof, provided that the rubber composition further contains (e) a metal compound in the case of containing only (b) the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent, and the spherical core has a hardness difference (Hs−Ho) between a surface hardness (Hs) and a center hardness (Ho) thereof of 20 or more in JIS-C hardness.
Public/Granted literature
- US20150065270A1 GOLF BALL Public/Granted day:2015-03-05
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